
public class Work0205 {
    public static void main(String[] args) {
           // 计算每天对应的毫秒数
           int ms = 24 * 60 * 60 * 1000;
           System.out.println("ms: " + ms);
   
           // 计算每天对应的微秒数
           long us = 24L * 60 * 60 * 1000 * 1000;
           System.out.println("us: " + us);
    }
}
